/*!	 waypointset.cpp
**	 Template File
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>

#include "waypointset.h"
#include <synfigapp/canvasinterface.h>

#include <synfigapp/localization.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;

ACTION_INIT(Action::WaypointSet);
ACTION_SET_NAME(Action::WaypointSet, "WaypointSet");
ACTION_SET_LOCAL_NAME(Action::WaypointSet, N_("Set Waypoint"));
ACTION_SET_TASK(Action::WaypointSet, "set");
ACTION_SET_CATEGORY(Action::WaypointSet, Action::CATEGORY_WAYPOINT);
ACTION_SET_PRIORITY(Action::WaypointSet, 0);
ACTION_SET_VERSION(Action::WaypointSet, "0.0");
ACTION_SET_CVS_ID(Action::WaypointSet, "$Id$");

Action::WaypointSet::WaypointSet()
{
    set_dirty(true);
}

Action::ParamVocab
Action::WaypointSet::get_param_vocab()
{
    ParamVocab ret(Action::CanvasSpecific::get_param_vocab());

    ret.push_back(ParamDesc("value_node", Param::TYPE_VALUENODE)
                  .set_local_name(_("Destination ValueNode (Animated)"))
                 );

    ret.push_back(ParamDesc("waypoint", Param::TYPE_WAYPOINT)
                  .set_local_name(_("Waypoint"))
                  .set_desc(_("Waypoint to be changed"))
                  .set_supports_multiple()
                 );

    return ret;
}

bool
Action::WaypointSet::is_candidate(const ParamList &x)
{
    return candidate_check(get_param_vocab(), x);
}

bool
Action::WaypointSet::set_param(const synfig::String& name, const Action::Param &param)
{
    if (name == "value_node" && param.get_type() == Param::TYPE_VALUENODE) {
        value_node = ValueNode_Animated::Handle::cast_dynamic(param.get_value_node());

        return static_cast<bool>(value_node);
    }

    if (name == "waypoint" && param.get_type() == Param::TYPE_WAYPOINT) {
        // NOTE: at the moment there is no error checking for multiple sets!!!
        waypoints.push_back(param.get_waypoint());

        return true;
    }

    return Action::CanvasSpecific::set_param(name, param);
}

bool
Action::WaypointSet::is_ready()const
{
    if (!value_node || waypoints.empty()) {
        return false;
    }

    return Action::CanvasSpecific::is_ready();
}

void
Action::WaypointSet::perform()
{
    WaypointList::iterator iter;

    vector<WaypointList::iterator>	iters;
    vector<Waypoint>::iterator i = waypoints.begin(), end = waypoints.end();

    for (; i != end; ++i) {
        try {
            iters.push_back(value_node->find(*i));
        } catch (synfig::Exception::NotFound) {
            throw Error(_("Unable to find waypoint"));
        }
    }

    // check to see which valuenodes are going to override because of the time...
    ValueNode_Animated::findresult timeiter;

    for (i = waypoints.begin(); i != end; ++i) {
        timeiter = value_node->find_time(i->get_time());

        bool candelete = timeiter.second;

        // we only want to track overwrites (not waypoints that are also being modified)
        if (candelete) {
            for (vector<WaypointList::iterator>::iterator ii = iters.begin(); ii != iters.end(); ++ii) {
                if (timeiter.first == *ii) {
                    candelete = false;
                    break;
                }
            }
        }

        // if we can still delete it after checking, record it, and then remove them all later
        if (candelete) {
            Waypoint w = *timeiter.first;
            overwritten_waypoints.push_back(w);
        }
    }

    // overwrite all the valuenodes we're supposed to set
    {
        i = waypoints.begin();

        for (vector<WaypointList::iterator>::iterator ii = iters.begin(); ii != iters.end() && i != end; ++ii, ++i) {
            old_waypoints.push_back(**ii);
            **ii = *i; // set the point to the corresponding point in the normal waypoint list
        }
    }

    // remove all the points we're supposed to be overwriting
    {
        vector<Waypoint>::iterator 	oi = overwritten_waypoints.begin(),
                                    oend = overwritten_waypoints.end();

        for (; oi != oend; ++oi) {
            value_node->erase(*oi);
        }
    }

    // Signal that a valuenode has been changed
    value_node->changed();
}

void
Action::WaypointSet::undo()
{
    WaypointList::iterator iter;

    vector<Waypoint>::iterator i = old_waypoints.begin(), end = old_waypoints.end();

    for (; i != end; ++i) {
        try {
            iter = value_node->find(*i);
        } catch (synfig::Exception::NotFound) {
            throw Error(_("Unable to find waypoint"));
        }

        // overwrite with old one
        *iter = *i;
    }

    // add back in all the points that we removed before...
    {
        vector<Waypoint>::iterator 	oi = overwritten_waypoints.begin(),
                                    oend = overwritten_waypoints.end();

        for (; oi != oend; ++oi) {
            value_node->add(*oi);
        }
    }

    // Signal that a valuenode has been changed
    value_node->changed();
}